Some clever sod has made a working PSVR driver for Windows, with a Steam VR layer.
http://trinusvr.com/psvr/
Been having a play with it this morning and whilst it's still very early, so is a bit short on configuration options, it works surprisingly well once setup.
You need to connect the break-out box and require a USB3.0 port, and it obviously doesn't work with any games requiring the Vive motion controllers. But it does support full (rotational) head-tracking and plays nicely with the PS4 controller supported Valve just added too.